You can combine your Experience Zone ticket with a guided LEGO® House tour or just buy it separately. Please note there is only guided tours on specific days. Get the full overview in the calendar in the bottom here.
If you as a group or company is interested in visiting LEGO House, you can book it through this link with a discounted price (minimum 20 people). You will be greeted by a Play Agent who will give you a short introduction to LEGO House